blob: f349cf1ec603b89f86ded523f27c1b8b3f8d9915 [file] [log] [blame]
// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/material.dart';
const String _text1 =
'Snackbars provide lightweight feedback about an operation by '
'showing a brief message at the bottom of the screen. Snackbars '
'can contain an action.';
const String _text2 =
'Snackbars should contain a single line of text directly related '
'to the operation performed. They cannot contain icons.';
const String _text3 =
'By default snackbars automatically disappear after a few seconds ';
class SnackBarDemo extends StatefulWidget {
const SnackBarDemo({ Key key }) : super(key: key);
static const String routeName = '/material/snack-bar';
@override
_SnackBarDemoState createState() => new _SnackBarDemoState();
}
class _SnackBarDemoState extends State<SnackBarDemo> {
int _snackBarIndex = 1;
Widget buildBody(BuildContext context) {
return new SafeArea(
top: false,
bottom: false,
child: new ListView(
padding: const EdgeInsets.all(24.0),
children: <Widget>[
const Text(_text1),
const Text(_text2),
new Center(
child: new RaisedButton(
child: const Text('SHOW A SNACKBAR'),
onPressed: () {
final int thisSnackBarIndex = _snackBarIndex++;
Scaffold.of(context).showSnackBar(new SnackBar(
content: new Text('This is snackbar #$thisSnackBarIndex.'),
action: new SnackBarAction(
label: 'ACTION',
onPressed: () {
Scaffold.of(context).showSnackBar(new SnackBar(
content: new Text('You pressed snackbar $thisSnackBarIndex\'s action.')
));
}
),
));
}
),
),
const Text(_text3),
]
.map((Widget child) {
return new Container(
margin: const EdgeInsets.symmetric(vertical: 12.0),
child: child
);
})
.toList()
),
);
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: const Text('Snackbar')
),
body: new Builder(
// Create an inner BuildContext so that the snackBar onPressed methods
// can refer to the Scaffold with Scaffold.of().
builder: buildBody
)
);
}
}